The Parametric Survival Fit Report
The content in the Parametric Survival Fit report depends on your specifications in the Fit Parametric Survival launch window:
• If you select All Distributions, a Parametric Survival Fit report appears for each distribution.
• If you specify a Cause column, a Parametric Survival Fit report appears for each cause. Otherwise, only one Parametric Survival Fit report appears.
Each Parametric Survival Fit report contains the following:
Effect Summary
Shows an interactive report that enables you to add or remove effects from the model. See “Effect Summary Report” in Fitting Linear Models.
Model Fit Details
The Time to event shows which Y column is specified, and the Distribution shows which distribution is fit. AICc, BIC, and -2Loglikelihood are all measures of the model fit. These measures allow for comparisons to other model fits. Observation Used and Uncensored Values are summary statistics for the data. See “Likelihood, AICc, and BIC” in Fitting Linear Models.
Whole Model Test
Compares the complete fit with an intercept-only fit. If there is only an intercept term, the fit is the same as that from the Life Distribution platform.
Parameter Estimates
Shows the estimates of the regression parameters.
A link to launch the Generalized Regression platform appears below the Parameter Estimates table. The link enables you to perform variable selection using the Generalized Regression platform and appears under the following circumstances:
– The model has no scale effects.
– No Cause column is specified in the launch window.
– The Distribution specified in the launch window is Normal, Lognormal, or Weibull.
Alternate Parameterization
(Available only for the Weibull distribution.) Shows the parameter estimates for the α and β parameterization of the Weibull distribution. For more information about this parameterization, see “Weibull”.
Wald Tests
Shows a Wald Chi-square test for each term in the model.
Effect Likelihood Ratio Tests
Compare the log-likelihood from the fitted model to one that removes each term from the model individually.
Plot Survival Quantiles
Shows the data points plotted with the 0.1, 0.5, and 0.9 quantiles.
Figure 15.5 The Parametric Survival Fit Report
